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Finding the Fourth Proportional to 80,009, 120,086.28 and 42,600.44

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Solution

The fourth proportional to 80,009, 120,086.28 and 42,600.44 is: 63,939.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,009 : 120,086.28 = 42,600.44 : x
  2. Step 2: Convert to fraction form
    80,009/120,086.28 = 42,600.44/x
  3. Step 3: Cross multiply
    80,009x = 120,086.28 × 42,600.44
  4. Step 4: Simplify right side
    80,009x = 5,115,728,365.96
  5. Step 5: Solve for x
    x = 5,115,728,365.96/80,009
  6. Step 6: Final answer
    x = 63,939.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.